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net: dsa: b53: Introduce b53_adjust_5325_mii()

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Takes care of doing the 5325 switch series specific MII programming and
is called from b53_adjust_link() to allow the future removal of
b53_adjust_link().

Signed-off-by: Florian Fainelli <florian.fainelli@broadcom.com>
Reviewed-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Link: https://lore.kernel.org/r/20240423183339.1368511-4-florian.fainelli@broadcom.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Florian Fainelli 2024-04-23 11:33:34 -07:00 committed by Jakub Kicinski
parent b3d06dc370
commit 0d18dea4cd
1 changed files with 25 additions and 19 deletions
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44
drivers/net/dsa/b53/b53_common.c
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@ -1309,6 +1309,29 @@ static void b53_adjust_531x5_rgmii(struct dsa_switch *ds, int port,
phy_modes(interface));
}
static void b53_adjust_5325_mii(struct dsa_switch *ds, int port)
{
struct b53_device *dev = ds->priv;
u8 reg = 0;
b53_read8(dev, B53_CTRL_PAGE, B53_PORT_OVERRIDE_CTRL,
&reg);
/* reverse mii needs to be enabled */
if (!(reg & PORT_OVERRIDE_RV_MII_25)) {
b53_write8(dev, B53_CTRL_PAGE, B53_PORT_OVERRIDE_CTRL,
reg | PORT_OVERRIDE_RV_MII_25);
b53_read8(dev, B53_CTRL_PAGE, B53_PORT_OVERRIDE_CTRL,
&reg);
if (!(reg & PORT_OVERRIDE_RV_MII_25)) {
dev_err(ds->dev,
"Failed to enable reverse MII mode\n");
return;
}
}
}
static void b53_adjust_link(struct dsa_switch *ds, int port,
struct phy_device *phydev)
{
@ -1316,7 +1339,6 @@ static void b53_adjust_link(struct dsa_switch *ds, int port,
struct ethtool_keee *p = &dev->ports[port].eee;
bool tx_pause = false;
bool rx_pause = false;
u8 reg = 0;
if (!phy_is_pseudo_fixed_link(phydev))
return;
@ -1342,24 +1364,8 @@ static void b53_adjust_link(struct dsa_switch *ds, int port,
b53_adjust_531x5_rgmii(ds, port, phydev->interface);
/* configure MII port if necessary */
if (is5325(dev)) {
b53_read8(dev, B53_CTRL_PAGE, B53_PORT_OVERRIDE_CTRL,
&reg);
/* reverse mii needs to be enabled */
if (!(reg & PORT_OVERRIDE_RV_MII_25)) {
b53_write8(dev, B53_CTRL_PAGE, B53_PORT_OVERRIDE_CTRL,
reg | PORT_OVERRIDE_RV_MII_25);
b53_read8(dev, B53_CTRL_PAGE, B53_PORT_OVERRIDE_CTRL,
&reg);
if (!(reg & PORT_OVERRIDE_RV_MII_25)) {
dev_err(ds->dev,
"Failed to enable reverse MII mode\n");
return;
}
}
}
if (is5325(dev))
b53_adjust_5325_mii(ds, port);
/* Re-negotiate EEE if it was enabled already */
p->eee_enabled = b53_eee_init(ds, port, phydev);